derfor.dk

📜 Historical scan 2026-10-12 02:49:33 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

derfor.dk is a .dk domain served by 2 nameservers (imani.ns.cloudflare.com, kianchau.ns.cloudflare.com). It was registered on 11 December 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.31.96 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 5 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 102ms

Nameserver	IP addresses	PTR	ASN / ISP
imani.ns.cloudflare.com	108.162.194.62 162.159.38.62 172.64.34.62 2606:4700:50::a29f:263e 2803:f800:50::6ca2:c23e 2a06:98c1:50::ac40:223e	imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com imani.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kianchau.ns.cloudflare.com	108.162.195.179 162.159.44.179 172.64.35.179 2606:4700:58::a29f:2cb3 2803:f800:50::6ca2:c3b3 2a06:98c1:50::ac40:23b3	kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com kianchau.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 114ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.31.96	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.176.46	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

7 records 91ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	43200s	aspmx.l.google.com	142.251.9.27 2a00:1450:4025:c01::1a	rc-in-f27.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	43200s	alt1.aspmx.l.google.com	192.179.20.26 2404:6800:4000:1027::1b	ncboms-in-f26.1e100.net ncboms-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	43200s	alt2.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx2.googlemail.com	192.179.20.26 2404:6800:4000:1027::1b	ncboms-in-f26.1e100.net ncboms-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx3.googlemail.com	192.178.158.26 2404:6800:4013:813::1a	lcdels-in-f26.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx4.googlemail.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1b	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx5.googlemail.com	172.253.158.27 2404:6800:4003:c26::1a	so-in-f27.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.21.31.96
🔶 Autoconfig	104.21.31.96

🔷 AAAA Records (IPv6)#

2 records 60ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::6815:1f60	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:b02e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 59ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.31.96,172.67.176.46 ech=AEX+DQBB/AAgACDgdByNFkKbsI7g3irOP8AxZloLesuZvIdUzp3srrgVdgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:1f60,2606:4700:3037::ac43:b02e

📝 TXT Records#

4 records 263ms

TXT Record
google-site-verification=1nFo3sFf_62hcsEnb92vT3Z9baG_aoKXRsieqKlTZIQ
google-site-verification=oTTP2cu3yfWgaLK9w1_E9FyK6wu9eQMHgiUmyUxDJZA
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhWJDkvqtYmZq19EA1Z4yUKnj36H/W7pfmBBwSkRPUAVjOX+G2hat1CH+MASwmKVxwhQxGRT4fRmfvPVzrp/wDA/ZxMo09fe08UVo2tW6Q/uE++zSikDTYgQLGubHLM1wcFjrcDBaCEVkkXaXscoqZfHcZn9mB4h4oclHP2d10rQIDAQAB
v=spf1 include:_spf.google.com ~all

✉️ SPF#

Policy	Record (derfor.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.derfor.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc-reports@derfor.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

10 records 86ms

Flags	Tag	Value
0	issue	comodoca.com
0	issue	digicert.com; cansignhttpexchanges=yes
0	issue	letsencrypt.org
0	issue	pki.goog; cansignhttpexchanges=yes
0	issue	ssl.com
0	issuewild	comodoca.com
0	issuewild	digicert.com; cansignhttpexchanges=yes
0	issuewild	letsencrypt.org
0	issuewild	pki.goog; cansignhttpexchanges=yes
0	issuewild	ssl.com

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-14 04:25:01

www	104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335) (address records, no CNAME)
www vs bare domain	Same network derfor.dk: 104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335) www.derfor.dk: 104.21.31.96 172.67.176.46 2606:4700:3033::6815:1f60 2606:4700:3037::ac43:b02e (AS13335)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.derfor.dk	KgyZuXzesTofmHDeu4OUiH0NqmKdRCmHlpxg9hnyJHQ
TXT	_acme-challenge.derfor.dk	Qyybh423CzF5ZGob3kcXo_B1mGmWvM2FdMhDaQg0QHw
TXT	_acme-challenge.derfor.dk	xNxBmvzW_vG5in_Mm7oOEo97sjreQTNwnv9R7xVQN1I

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

173ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

377ms

Field	Value
Serial	2417234018
Primary NS (MNAME)	imani.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-11 00:25:31

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2004-12-11
Expires	2031-12-31 (1901d)

📋 WHOIS#

⏱️ Lookup Timing#

102ms

114ms

91ms

AAAA

60ms

TXT

263ms

CAA

86ms

HTTPS

59ms

TLSA

697ms

SOA

377ms

MTA-STS

106ms

DNSSEC

173ms

SRV

140ms

Total

2725ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 04:25:01	3456ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-13 03:46:34	1710ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-12 02:49:33 shown	2725ms	2 NS 2 A 7 MX	🔒 Secure
2026-10-10 23:59:44	749ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-26 17:06:51	1209ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-14 11:04:27	2719ms	2 NS 2 A 7 MX	🔒 Secure
2026-09-08 05:54:42	2307ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-27 05:44:50	2103ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-19 23:22:13	14352ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-16 10:12:44	5760ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-12 06:02:38	10802ms	2 NS 2 A 7 MX	🔒 Secure
2026-08-10 03:31:31	10887ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-29 18:08:48	3939ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-22 05:14:52	1968ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-16 23:33:20	10672ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-09 01:32:07	10213ms	2 NS 2 A 7 MX	🔒 Secure
2026-07-03 11:10:59	1143ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-25 18:52:32	1065ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-19 12:54:26	2622ms	2 NS 2 A 7 MX	🔒 Secure
2026-06-17 02:05:55	943ms	2 NS 2 A 7 MX	🔒 Secure